Unable to enable log shipping on Linux

Hi,

We have 2 nodes running Ubuntu 16.04 and SQL server 2019.
The error we get when we try to enable log shipping is:

Msg 32018, Level 16, State 3, Server mssql02, Procedure master.dbo.sp_add_log_shipping_secondary_primary, Line 129
Log shipping is not installed on this instance.
RegQueryValueEx() returned error 2, 'The system cannot find the file specified.'

Can't figure out what the problem is.
Have you seen this error or have any tip on how to solve it?